Electronics and Communication Engineering - Microwave Communication

41. 

Most electromagnetic transmission in rectangular wave-guide uses

A. TE10 mode
B. TE01 mode
C. TE20 mode
D. TE11 mode

Answer: Option A

Explanation:

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42. 

Loading of a line means

A. increasing inductance of line
B. increasing distributed inductance of line
C. decreasing distributed inductance of line
D. decreasing inductance of line

Answer: Option B

Explanation:

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43. 

The frequency of oscillations obtained from a reflex klystron depends mainly on

A. resonant frequency of cavity
B. repeller voltage
C. voltage of focussing electrode
D. characteristics of cathode

Answer: Option A

Explanation:

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44. 

The main advantage of TWT over klystron is

A. higher bandwidth
B. higher gain
C. higher frequency
D. higher output

Answer: Option A

Explanation:

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45. 

In a TWT the phase velocity of the axial component of the field on the slow wave structure is kept

A. equal to velocity of electron
B. slightly less than velocity of electron
C. slightly more than velocity of electron
D. equal to velocity of light in free space

Answer: Option A

Explanation:

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